Description
The course offers a solid understanding of the interoperability/interworking issues that must be taken into consideration when the Evolved UTRAN (E-UTRAN) and the Evolved Packet Core (EPC) are introduced in 3GPP Release 8. The course covers interworking end-to-end, including terminal (UE) issues, radio access network issues (GERAN, UTRAN, E-UTRAN, other) and core network issues (EPC, legacy CN). A number of PS handover/mobility signalling flows are investigated step-by-step, providing the student with a comprehensive view of the functionality needed in the involved network nodes for proper Idle mode and Connected mode interworking. The course also contains sections on CS interworking, including the solutions endorsed by 3GPP (CS Fallback and SR-VCC) as well as the Voice over LTE via Generic Access solution defined by the VoLGA Forum.
Target group
The course is targeted at those who need detailed knowledge of the UE, RAN and CN related functions that are impacted by the introduction of the LTE (E-UTRAN) radio access network and the migration towards the Evolved Packet Core network (EPC).
Prerequisites
General knowledge of legacy mobile systems (GSM/UMTS) as well as the EPS is required. Familiarity with basic signalling cases such as EPS/GPRS Attach and Tracking/Routing Area Update is useful.
The course ”LTE Protocols & Signalling” or “EPC Protocols & Signalling” are recommended.
Other
This course is a well-balanced mix of lectures, presentations, discussions and mind-maps. This course is avaible as scheduled training and the presentation is given in English or Swedish. This is a theoretical course. We can also give this course as on-site training. If you are interested in customized education, don´t hesitate to contact us for furher information.
Agenda
Network Topology Options
- Overview of 3GPP releases
- EPS and pre-EPS network architecture (PS domain)
- Interfaces between LTE/EPC and legacy RAN/CN
- S4-SGSN or Gn/Gp-SGSN
- PGW/SGW or GGSN
- Architecture with combined nodes
PLMN/Cell Selection and Reselection
- PLMN selection (incl. network sharing)
- Cell selection criteria for GSM, UMTS and LTE
- Signalling of UE inter-RAT capabilities
- Cell reselection criteria for GSM, UMTS and LTE
- Priority based vs offset based reselection
- Network control of cell reselection
Idle Mode Mobility
- Inter-RAT Tracking/Routing Area Update procedures
- Idle Mode Signalling Reduction (ISR)
- The ‘TIN’ concept and mapping between GUTI and PTMSI/RAI
- Usage of Subscriber Profile Id for RAT/frequency priority (SPID)
- Conversion between EPS and non-EPS security contexts
Connected Mode UE Measurements
- UE measurement capabilities
- Network control of Inter-RAT measurements
- Measurement quantities (RSSI, RSCP, RSRP etc)
- Cell search for GERAN/UTRAN/E-UTRAN
- Measurement gaps and compressed mode
- Inter-RAT event reporting in LTE
PS Interworking
- ‘Always-on’ EPS bearer concept vs ‘on-demand’ PDP contexts
- PS Handover/relocation between E-UTRAN and UTRAN
- PS Handover and NACC between E-UTRAN and GERAN
- Conversion between EPS QoS and non-EPS QoS attributes
- Mobility support in early LTE terminal implementations
- Transparent forwarding of RAN protocol containers
CS Interworking Solutions
- UE preferred modes of operation and network support of voice
- CSFB: nodes, interfaces and requirements
- SMS over SGs-interface
- SR-VCC: nodes, interfaces and requirements
- VoLGA: nodes, interfaces and requirements
- Relation between solutions and to other features (e.g. ISR, DTM etc)
Interworking with non-3GPP Access Networks
- The S2a- and S2b-interfaces
- Optimised vs non-optimised mobility solutions
- PMIP-based mobility between LTE and non-3GPP access
- The Access Network Discovery and Selection Function
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